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Finding the Fourth Proportional to 655.22, 980.71 and 481.85

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Solution

The fourth proportional to 655.22, 980.71 and 481.85 is: 721.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.22 : 980.71 = 481.85 : x
  2. Step 2: Convert to fraction form
    655.22/980.71 = 481.85/x
  3. Step 3: Cross multiply
    655.22x = 980.71 × 481.85
  4. Step 4: Simplify right side
    655.22x = 472,552.68
  5. Step 5: Solve for x
    x = 472,552.68/655.22
  6. Step 6: Final answer
    x = 721.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.